How to call a c library from unity3D C# code

Go through this link. This gives the idea for making plugins for iOS. If any doubt, ask.

A practical example for plugin

1) Make a C# file called AppControllerBinding.cs in the plugins folder in Unity and add the code as followed:

 using UnityEngine; using System.Collections; using System.Runtime.InteropServices; // All Objective-C exposed methods should be bound here public class AppControllerBinding { [DllImport("__Internal")] private static extern void _MyFunction(string myName); public static void MyFunction(string MyNameIN) { // Call plugin only when running on real device if( Application.platform == RuntimePlatform.IPhonePlayer ) _MyFunction(MyNameIN); } } 

2) Add the MyFunction() function to the bottom on the AppController.mm file inside Xcode as follows (after the @end statement):

extern "C" { void _MyFunction(const char* MyName) { NSString* s = [NSString stringWithUTF8String: MyName]; [Self logName:s]; //<-----logName is method which takes string parameter printf_console("_MyFunction() called in Appcontroller.mm in Xcode.\n"); } } 

3) When you want to use the logName function of AppController.mm inside Unity just make a call like this:

AppControllerBinding.MyFunction("Nick");